Related Experiment Videos
Shear bond strength of experimental methacrylated beta-cyclodextrin-based formulations
Latiff A Hussain1, Sabine H Dickens, Rafael L Bowen
1Paffenbarger Research Center, American Dental Association Foundation, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8546, Gaithersburg, MD 20899, USA. latiffaltaf@yahoo.com
Biomaterials
|January 1, 2005
Summary
Methacrylated beta-cyclodextrins (MCDs) show promise as dental bonding agents, enhancing composite adhesion to dentin. Optimized formulations achieved significant shear bond strength (SBS), comparable to commercial products.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Methacrylated beta-cyclodextrins (MCDs) are utilized as comonomers in dental composites.
- MCDs possess polymerizable methacrylate and hydrophilic hydroxyl groups, potentially improving dentin bonding.
Purpose of the Study:
- To evaluate MCDs as adhesive comonomers for dental composites.
- To optimize comonomer and initiator concentrations for maximum shear bond strength (SBS).
Main Methods:
- Experimental MCD-based bonding solutions were prepared with varying concentrations of MCDs and 2-hydroxyethyl methacrylate (HEMA) in acetone.
- Formulations were activated with camphorquinone (CQ) and ethyl 4-dimethylamino benzoate (4E).
- Shear bond strength (SBS) was tested on acid-etched human molar dentin bonded with experimental solutions and a commercial control.
Main Results:
- SBS increased with HEMA concentration, reaching 16 MPa with 33% MCD, 30% HEMA, and 37% acetone.
- Maximum SBS of 21 MPa was achieved by optimizing CQ and 4E concentrations, comparable to a commercial control.
- Nonacidic MCD monomers demonstrated adhesion-promoting capabilities.
Conclusions:
- Nonacidic MCD monomers can function as effective adhesion-promoting comonomers in dental bonding formulations.
- Further enhancements in SBS are anticipated with modifications like polymerizable acidic cyclodextrin derivatives.